files-importer is a Node.js command-line tool that synchronously copies the contents of a directory (including subdirectories recursively) to another location without creating duplicate files. It can be used to import only images and videos that have not already been imported from a camera or a memory card. files-importer is written using functional programming (fp-ts) in TypeScript.

• files-importer runs on Mac, Linux and Windows, just git checkout this repository and install its dependencies using npm install.
• Open the command line and run npm start source target where source and target are paths to directories, example npm start ~/Documents/my-pictures-library ~/Documents/new-pictures
• files-importer will compare the two directories and copy the contents from source to target only if target does not have the file present in source.